Applications

Specific use cases for the OiW-100 include:

wastewater

pond water

cooling water

The suitability conditions for the OiW-100 Oil-in-Water Analyzer include:

The sample must be a homogenous mixture (uniform distribution) of oil and water. Due to the immiscibility of oil in water at higher concentrations, the maximum practical concentration range is typically 0-100 mg/L.

The oil must be defined and contain UV-absorbing constituent chemicals (aromatic hydrocarbons). The analyzer measures the UV absorbance of these constituent chemicals and correlates it to the total oil concentration, so the oil composition must be consistent.

The water can not contain additional UV-absorbing chemicals which are not considered oil constituents. These chemicals will interfere with the analysis and produce false-positive oil concentration. This limitation makes the OiW-100 unsuitable for some wastewater applications where water composition is unpredictable.

Technology

Principle of Operation

To analyze the chemical composition of the sample, the OiW-100 uses an analysis method known as ultraviolet-visible (UV-Vis) spectroscopy. The system measures absorbance from 200nm to 800nm and quantifies the amount of light absorbed by the sample at each integer wavelength; the OMA plots this raw data to visualize a high-resolution absorbance spectrum.

The OiW-100 uses a long-life xenon light source to transmit a signal through the sample fluid in the flow cell. The signal is carried by fiber optic cables from the analyzer to the flow cell, where the chemical mixture of the sample has unique interactions with the light based on its current composition. Learn more

Oil-to-Aromatics Correlation

To measure total oil concentration in water, the OiW-100 measures the total absorbance of aromatic hydrocarbons in the water and correlates this value to total oil. This method requires calibration using a sample of the customer's oil to establish a highly accurate oil-to-aromatics correlation. Of course, this method also requires that the oil contain aromatics (e.g. benzene) because these are the primary UV-absorbing species in the oil.

The height of the total aromatics' absorbance curve correlates directly to the real-time oil concentration:

Absorbance Curves: Oil Analytes

Benzene

Toluene

Xylene

Absorbance (AU)

Wavelength (nm)

User Interface

Our proprietary ECLIPSE software processes the raw spectral data to provide real-time concentration readings. The operator can easily navigate between views (trendgraph, spectrum, and more) using intuitive touch-screen navigation. You can also configure alarms, data logging, and outputs. Learn more

Specifications

Note: All performance specifications are subject to the assumption that the sample conditioning system and unit installation are approved by Applied Analytics. For any other arrangement, please inquire directly with Sales.